Robot Parts, Not Robots
Steven Webster@stevenjwebster
−10.8%
since Oct 6
The idea
I believe humanoid robots move from demos to everyday purchases within five years, so instead of guessing which robot wins, I own the parts every builder needs: motion and joints, compute, sensors, magnets, test gear, and power. The basket stays concentrated in those bottlenecks rather than spread thin, and I keep a 10% cash reserve to add if the theme sells off. This is a long-term bet on the whole supply chain, not a single robot maker.
What it owns
- A humanoid is mostly motors and gears, roughly thirty to forty joints each, and these companies make the US-listed versions of those parts. · Regal RexnordIt sells motors and gears at scale, the core motion hardware every humanoid requires regardless of which builder wins., AMETEKIt sells specialty motors and sensing instruments that go into the kind of compact, high-performance joints humanoids need., Parker HannifinIt is the broad motion-systems supplier of actuators and controls, adding humanoid production to its existing industrial demand., NovantaIt makes the precise motion parts, encoders and controls that let a robot hand do fine work on real household tasks., AllientIt is focused on the compact motors humanoids use by the dozen, so robot orders would move its numbers far more than a giant's.26%
- Humanoid robots need chips to see, think and move, and a few companies supply nearly all of them. · NVIDIAIt sells the training chips and robot-specific computers that most humanoid builders are standardizing on as their platform., QualcommIt makes efficient on-device compute that lets a household robot think locally without phoning a data center for every step., AmbarellaIt makes low-power chips that process camera video right on the device, exactly what a robot walking around a kitchen needs.20%
- Robots navigate homes with cameras and depth sensors, so the vision suppliers sell into every builder. · onsemiIt supplies the image sensors that serve as robot eyes, plus the power chips around them., Teledyne TechnologiesIt owns a stable of imaging and sensing businesses that feed machine vision from several directions at once., OusterIt makes lidar, the laser sensor that lets a machine map a room in three dimensions if humanoids end up needing it.15%
- Every joint motor needs rare-earth magnets, and China controls most of the supply, making US sources scarce and strategic. · MP MaterialsIt is the main US source of rare-earth ore and finished magnets that every robot motor needs., Carpenter TechnologyIt makes the specialty metals that go into high-performance motors and precision parts, one of few US suppliers at this grade.12%
- Building millions of robots requires automation and test equipment, a layer that gets paid before a single robot sells. · TeradyneIt tests the semiconductors every humanoid needs and also owns Universal Robots, so it gets paid twice as robot volume grows., Rockwell AutomationIt sells the automation gear that robot factories run on, even before household robots arrive if builders keep spending on production lines.11%
- A robot that works all day needs dense batteries and efficient power conversion, a quiet bottleneck in every design. · EnovixIt packs more energy into the same battery space, the riskiest position because it needs to reach real production wins within the timeframe., VicorIt makes compact modules that move power from battery to motors and chips efficiently, the real constraint in a machine that carries its own energy.6%
- Cash10%